How to instantiate SVGLength / SVGAngle?

[duncanmak]

I came across this explanation from @RyanCavanaugh on StackOverflow, http://stackoverflow.com/questions/26220243/instantiating-new-htmlelement-in-typescript

It looks like SVGLength and SVGAngle also fit in this category.

Is there something we can do so that these types can be instantiated? In JS today (Chrome 41), new SVGLength() throws an exception.

Idea: Perhaps this is a case where the 1.5 annotations can be used to offer some explanation for what to do.

[danquirk]

The right solution might be something as simple as marking the constructors private (#2341) or some other uncallable annotation

[RyanCavanaugh]

These classes can still be extended, so they need a public constructor. Seems like we're just not going to fix this one.